#include<stdio.h>
using namespace std;
typedef struct Node
{
    int val;
    Node *next;
    /* data */
}Node;

class FindNode
{
private:
    int size;
    Node *head;
    /* data */
public:
    FindNode(int val);
    void insertNode(int val);
    int getListLength();
    Node* FindNodeByReverseK(int k);
    ~FindNode();
};

